I/O size (minimum/optimal): 512 bytes / 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Model name : Intel(R) Xeon(R) CPU E31220 3.10GHzįlags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpidĪddress sizes : 36 bits physical, 48 bits virtualĭisk /dev/sda: 2000.4 GB, 2000398934016 bytesĢ55 heads, 63 sectors/track, 243201 cylinders LV UUID aaM6M9-ifLs-cwXN-isc0-RKZu-9hUq-7LQSmw I've provided a host of diagnostic information with the hopes that one of you could give me a tip or pointer that might get me back on track so I can increase performance.
I'm wondering if there is something in my setup that is the root of my performance woes. I still have my doubts about LVM atop of softRAID, however, primarily because this is the first server I've deployed with such a configuration. Strangely, I rarely ever got more than 70% utilization even when I was receiving complaints. I then ran iostat on 10 second intervals, wondering if the hard disk was at fault. It turns out that while the connection sustains a certain amount of traffic, utilization tends to stay below 50%, even when there are complaints of slow transfer speed. I ran iptraf for a while, wondering if the network interface was saturated with competing network traffic. I had wondered if Samba was responsible so I set up a NFSv4 export (using TCP) and found that transfer rates between Samba and NFS were comparable and never went above 10 MB/s. Copying from one server folder to another (via a workstation) is just as slow. File copies to the server, in particular, average at 6-8 MB/s. The problem is when my users are copying files to and from the server, the performance is absolutely horrid. All of the workstations have gigabit network interfaces. The server and all of the workstations are connected to a single 48 port gigabit switch.
SOFTRAID SLOW READ WINDOWS 7
I have a CentOS 6.4 (圆4) server running Samba 3.x that serves approximately 15 Windows XP and Windows 7 workstations.